21513532202342 has 16 divisors (see below), whose sum is σ = 32344822828032. Its totient is φ = 10731930287040.

The previous prime is 21513532202341. The next prime is 21513532202359. The reversal of 21513532202342 is 24320223531512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21513532202341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6160667 + ... + 8998937.

It is an arithmetic number, because the mean of its divisors is an integer number (2021551426752).

Almost surely, 2^{21513532202342} is an apocalyptic number.

21513532202342 is a deficient number, since it is larger than the sum of its proper divisors (10831290625690).

21513532202342 is a wasteful number, since it uses less digits than its factorization.

21513532202342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847023.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 21513532202342 its reverse (24320223531512), we get a palindrome (45833755733854).

The spelling of 21513532202342 in words is "twenty-one trillion, five hundred thirteen billion, five hundred thirty-two million, two hundred two thousand, three hundred forty-two".